that 和 it 代不可数名词区别在哪里in my opinion,life in the twenty-first centry is much easier than————A that used to be .B.it is used to.C.it was used to D.it used to be.选D是为什么呢？为什么A就不行呢？

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that 和 it 代不可数名词区别在哪里in my opinion,life in the twenty-first centry is much easier than————A that used to be .B.it is used to.C.it was used to D.it used to be.选D是为什么呢？为什么A就不行呢？
that 和 it 代不可数名词区别在哪里
in my opinion,life in the twenty-first centry is much easier than————
A that used to be .B.it is used to.
C.it was used to D.it used to be.
选D是为什么呢？为什么A就不行呢？

that 和 it 代不可数名词区别在哪里in my opinion,life in the twenty-first centry is much easier than————A that used to be .B.it is used to.C.it was used to D.it used to be.选D是为什么呢？为什么A就不行呢？
D
life in the twenty-first centry is much easier than it used to be.
life in the twenty-first centry is much easier than that in the twentieth.
原因我说不上来,只是感觉,但是不会错.以上两句你比较,都是正确的句子.
English can be learnt.It cannot be studied.

D

that作代词时,是不是可以代不可数名词啊?one 、it、 that三者的区别拜托了各位 that 和 it 代不可数名词区别在哪里in my opinion,life in the twenty-first centry is much easier than————A that used to be .B.it is used to.C.it was used to D.it used to be.选D是为什么呢？为什么A就不行呢？ 集体名词和不可数名词如何区别 可数名词和不可数名词的区别 可数名词和不可数名词区别 it和that的区别it 和 that 不是都有指代前文出现过的名词吗,那这两词有什么区别呢?有人说复数用that 单数用it 但不可数怎么办呢 要用代词代指不可数名词,用it好还是they好?one可以代指不可数名词么? little+不可数名词 和a little +不可数名词的区别是什么?little+不可数名词=?a little +不可数名词=? 为什么rubbish是不可数名词就要用it指代?求them和it的区别～ this和that后可加不可数名词吗? this和that后可加不可数名词吗? 可数名词和不可数名词怎么区别英语的,什么是不可数名词,什么是可数名词 可数和不可数名词的区别 可数和不可数名词的区别 what how 感叹句在名词是不可数名词时,怎么区别用what和how 可数名词和不可数名词练习题?可数名词和不可数名词练习题在哪找呢? 英语中的可数名词和不可数名词有什么区别 英语中可数名词和不可数名词的区别?